On her 18th birthday, orphan Angela Rutherford is given an inheritance of $6000. Her wisecracking friend Jimmy Plum arranges for a professional band to perform a number for her party, "You're a Lollapalooza", sung and danced by Jimmy and the band's Sally McGuire. Afterward, Sally tells Jimmy she likes him, but he is in love with Angela, who in turn is infatuated with Army surgeon Major Hilary Jarret. Angela is certain that Jimmy's father, Dr. Plum, will arrange a Conscription in the United States so that Jimmy can follow in his footsteps and go to medical school, but Jimmy insists he is going to enlist.